Answer this question truthfully
### Question: What Causes Cardiac Amyloidosis?
### Response: Amyloidosis refers to a family of diseases in which there is a buildup of clumps of proteins called amyloids in body tissues and organs. These proteins slowly replace normal tissue, leading to failure of the involved organ. There are many forms of amyloidosis that may involve specific organs like the heart (cardiac amlyoidosis), the neurologic system with a peripheral neuropathy or the kidney. Cardiac amyloidosis usually occurs as part of primary amyloidosis (AL type amyloidosis). Primary amyloidosis is often seen in people with multiple myeloma and cancer. Cardiac amyloidosis (" stiff heart syndrome ") occurs when amyloid deposits take the place of normal heart muscle. It is the most typical form of restrictive cardiomyopathy. Cardiac amyloidosis may affect the way electrical impulses move through the heart (electrical conduction system). This can lead to irregular heart beating also known as arrhythmias and failure of the electrical impulses to conduct through the heart (heart block). Secondary amyloidosis (AA type amyloidosis) rarely affects the heart. However, one form of secondary amyloidosis called senile amyloidosis may involve the heart and blood vessels. Senile amyloidosis is caused by overproduction of a different protein. The condition is becoming more common as the average age of the population increases.
There is no difference in the incidence of cardiac amyloidosis between men and women as it affects both genders equally. The disease is rare in people under age 40.